TransCanada Corp. will begin construction on the southern leg of its Keystone XL pipeline in coming weeks after securing the last of three key permits from the U.S. Army Corps of Engineers.

The company announced Friday it had received a permit for the 485-mile project from the Fort Worth district. Engineers in Tulsa and Galveston, Texas, previously signed off on the project.

“TransCanada is now poised to put approximately 4,000 Americans to work constructing the $2.3 billion pipeline that will be built in three distinct ‘spreads' or sections,” CEO Russ Girling said. “The Gulf Coast Project will contribute millions in property taxes to counties in Oklahoma and Texas — money that can be used to build roads, schools and hospitals.”

The planned pipeline will connect the crude oil storage hub at Cushing with refineries along the Gulf Coast.